<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>用户名：<input type="text" name="uname"> <br>
密码：<input type="password" name="upsw"> <br>
性别：
<input type="radio" name="sex" value="man">男
<input type="radio" name="sex" value="woman" checked="checked">女<br>
<input type="button" onload="function f() {

}">
</body>
</html>